I believe the already existing Dark AoE immobilize powers are named "Tenebrous Tentacles". Just mentioning.
Not bad, but nothing that really stands out either. A few name changes needed (Midnight Grasp and Levitate are already used for other powers).
I'd personally change Ghostly Phase to a foe intangibility instead of self phase, Controller primaries is about affecting enemies, not yourself or your team
Icelock - Ice/Storm Controller
Command Bot 1 - Bot/Traps MM
well, Illusions have a self and team bonus, as does plant control, so i added something similar to the Illusion set set. As for Midnight grasp, thats a Proliferated power. Levitate could be renamed as 'ghotly Lift' then instead.
As for the foe intangibility, there already is one in the dark miasma set called black hole.
A total of 14 of my nerves have been harmed in the making of this post...
Ok, I forgot about the invis powers and the spirit tree, I'll grant you that. Still not a fan of phase powers for PvE, so I'll suggest another power
Ghost Army: You call upon dark spirits who follow you for a short while. Each spirit attacks one target, inflicting a random control before dissipating: Hold, Confuse, Fear, Immobilize
I really don't see a Tier 9 melee power being a good choice for a Tier 1 controller power. Putting controller power scale on that power would still make it a very damaging power, well over other primaries. Make it a ST version of Tenebrous Tentacles instead.
Having an intangible power in dark miasma does not invalidate having one in Dark Control. There's already one in Forcefields, so you can stack them today by combining Gravity/Forcefields. But this is no longer an issue with this suggested powerset 
Icelock - Ice/Storm Controller
Command Bot 1 - Bot/Traps MM
[ QUOTE ]
Just something I'd like to see, dark control, a very 'Ghost' like powerset thats Fun and Scary, I tried to come up with a few powers meyself and used some old ones tied in with it, so here goes!
DARK CONROL
You draw the powers of the netherealm to Control and manipulate your foes with a variety of Haunting Attacks that will hurt and scare your opponents.
1) Midnight Grasp (negative minor DoT, Immobilise, -Acc)
Mastery over the forces of the Netherworld allows you to create dark tentacles that can Immobilize a foe and continuously drain his life force.
2) Levitate (Negative/Smashing moderate, Knockup)
you Lift a foe in the air with Dark Telekinetic energy and violently drop them to the Ground, the experience afterwards leaves them damaged by dark energy
3) Necroplasmic Grasp (negative High DoT, Hold)
You hold your Foe in a grasp of Dark Spirit energy, rendering them unable to move and take negative energy damage over time
4) Dark Cloud (AoE -Acc, -preception, -ToHit)
You Conjour up a dark cloud from the netherealm and Block your foes Sight, they will not be able to see you but you still can be discovered within Melee Range
5) Midnight Shroud (AoE Moderate negative DoT, Immobilise, -Acc)
using the powers of the netherworld, you create dark Tentacles around your foes feet and immobilise them and drains thier life force, targets unnafected by the immobilise will still suffer a loss to accuracy
6) Fearsome Wave (PBAoE fear)
You summon a wave of Dark Spirits to phase through your foes, the experience of which leaves them scared and trembling in place
7) Necroplasmic Cages (AoE Hold)
You call forth cages of Ghostly energy to trap your enemies, unlike necroplasmic Grasp, this power does no damage to those held
8) Ghostly Phase (self Intangible, stealth)
You Shift your form into one of a ghost, causing you to become less visable and unable to be attacked, but in this form you cannot touch the mortal world and therefore cannot attack
9) Dark Thaughts (PBAoE negative/Psionic High, foe Confuse)
You Tempt the minds of your surronding foes to Stop thier assault upon you and direct the attack on thier allies, The Anger in thier minds makes them feel great pain and will become damaged after the confusion
(note: For Controllers, This set has dark Miasma Proliferated as a Secondary, and Dominators will have a form of 'Dark Assault' as thier secondary)
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I wanted something like this for a long time. There is one Dark Controller out there: Malaise. Even with Dark Phantom Army. <drool>
[Thought I replied your threat before, but my reply disappeared...]
Hmmm, taking what you both said i could replace the ghostly phase with a Phantom Army type power, but Instead of it being Tankers, It will be the Necromancy Spirits (Zombies turned ghost)
A total of 14 of my nerves have been harmed in the making of this post...
Just something I'd like to see, dark control, a very 'Ghost' like powerset thats Fun and Scary, I tried to come up with a few powers meyself and used some old ones tied in with it, so here goes!
DARK CONROL
You draw the powers of the netherealm to Control and manipulate your foes with a variety of Haunting Attacks that will hurt and scare your opponents.
1) Midnight Grasp (negative minor DoT, Immobilise, -Acc)
Mastery over the forces of the Netherworld allows you to create dark tentacles that can Immobilize a foe and continuously drain his life force.
2) Levitate (Negative/Smashing moderate, Knockup)
you Lift a foe in the air with Dark Telekinetic energy and violently drop them to the Ground, the experience afterwards leaves them damaged by dark energy
3) Necroplasmic Grasp (negative High DoT, Hold)
You hold your Foe in a grasp of Dark Spirit energy, rendering them unable to move and take negative energy damage over time
4) Dark Cloud (AoE -Acc, -preception, -ToHit)
You Conjour up a dark cloud from the netherealm and Block your foes Sight, they will not be able to see you but you still can be discovered within Melee Range
5) Midnight Shroud (AoE Moderate negative DoT, Immobilise, -Acc)
using the powers of the netherworld, you create dark Tentacles around your foes feet and immobilise them and drains thier life force, targets unnafected by the immobilise will still suffer a loss to accuracy
6) Fearsome Wave (PBAoE fear)
You summon a wave of Dark Spirits to phase through your foes, the experience of which leaves them scared and trembling in place
7) Necroplasmic Cages (AoE Hold)
You call forth cages of Ghostly energy to trap your enemies, unlike necroplasmic Grasp, this power does no damage to those held
8) Ghostly Phase (self Intangible, stealth)
You Shift your form into one of a ghost, causing you to become less visable and unable to be attacked, but in this form you cannot touch the mortal world and therefore cannot attack
9) Dark Thaughts (PBAoE negative/Psionic High, foe Confuse)
You Tempt the minds of your surronding foes to Stop thier assault upon you and direct the attack on thier allies, The Anger in thier minds makes them feel great pain and will become damaged after the confusion
(note: For Controllers, This set has dark Miasma Proliferated as a Secondary, and Dominators will have a form of 'Dark Assault' as thier secondary)
A total of 14 of my nerves have been harmed in the making of this post...